Vapor pressure lowering agent for seal water in drain trap, method for preventing seal breakage in drain trap by using vapor pressure lowering agent for seal water in drain trap, antifreezing agent for water, and method for preventing seal breakage in drain trap by using antifreezing agent for water

Abstract

A water vapor pressure lowering agent which is safe, is easily mixed with seal water, and is usable even in a cold region; the water vapor pressure lowering agent includes urea, a surfactant, purified glycerol, and water or alkaline reducing water, and the purified glycerol is obtained by purifying waste glycerol containing ethanol, an oil or fat, water, and a carbide by distillation. In a method for preventing seal breakage in a drain trap (T) by using the water vapor pressure lowering agent, the vapor pressure lowering agent is introduced such that a liquid level is equal to or higher than a seal water maintenance lower limit in a seal water portion of the drain trap (T).

The invention claimed is: 
     
       1. A vapor pressure lowering agent for seal water in a drain trap, comprising urea, a surfactant, purified glycerol, and water or alkaline reducing water, wherein
 the purified glycerol is obtained by purifying waste glycerol containing ethanol, an oil or fat, water, and a carbide by distillation, and 
 the urea is contained in an amount of 10 to 15 wt %. 
 
     
     
       2. The vapor pressure lowering agent for the seal water in the drain trap according to  claim 1 , wherein an amount of the surfactant is 0.1 to 5 wt %, an amount of the purified glycerol is 10 to 80 wt %, and the rest of the agent is mainly the water or the alkaline reducing water. 
     
     
       3. The vapor pressure lowering agent for the seal water in the drain trap according to  claim 1 , wherein the agent includes 20 to 80 wt % of the water or the alkaline reducing water. 
     
     
       4. The vapor pressure lowering agent for the seal water in the drain trap according to  claim 1 , wherein pH of the entire agent is 9.0 to 10.0. 
     
     
       5. The vapor pressure lowering agent for the seal water in the drain trap according to  claim 1 , wherein the purified glycerol is obtained by esterifying and purifying a plant-derived edible waste oil. 
     
     
       6. A method for preventing seal breakage in a drain trap by using the vapor pressure lowering agent for the seal water in the drain trap according to  claim 1 , the method comprising:
 introducing the vapor pressure lowering agent such that a liquid level is equal to or higher than a seal water maintenance lower limit in a seal water portion of the drain trap. 
 
     
     
       7. The method for preventing seal breakage in the drain trap according to  claim 6 , wherein a mixing ratio of the purified glycerol in the vapor pressure lowering agent is set such that even when a vaporization component in the vapor pressure lowering agent vaporizes, the purified glycerol is ensured in such a remaining amount as to be equal to or higher than the seal water maintenance lower limit in the seal water portion of the drain trap, and the vapor pressure lowering agent is introduced to the seal water portion of the drain trap. 
     
     
       8. An antifreezing agent for water comprising urea, a surfactant, purified glycerol, and water or alkaline reducing water, wherein
 the purified glycerol is obtained by purifying waste glycerol containing ethanol, an oil or fat, water, and a carbide by distillation, and 
 the urea is contained in an amount of 10 to 15 wt %. 
 
     
     
       9. The antifreezing agent for water according to  claim 8 , wherein an amount of the surfactant is 0.1 to 5 wt %, an amount of the purified glycerol is 10 to 80 wt %, and the rest of the agent is mainly the water or the alkaline reducing water. 
     
     
       10. The antifreezing agent for water according to  claim 8 , wherein the agent includes 20 to 80 wt % of the water or the alkaline reducing water. 
     
     
       11. The antifreezing agent for water according to  claim 8 , wherein pH of the entire agent is 9.0 to 10.0. 
     
     
       12. The antifreezing agent for water according to  claim 8 , wherein the purified glycerol is obtained by esterifying and purifying a plant-derived edible waste oil. 
     
     
       13. A method for preventing seal breakage in a drain trap by using the antifreezing agent for water according to  claim 8 , the method comprising:
 introducing the antifreezing agent such that a liquid level is equal to or higher than a seal water maintenance lower limit in a seal water portion of the drain trap. 
 
     
     
       14. The method for preventing seal breakage in the drain trap according to  claim 13 , wherein a mixing ratio of the purified glycerol in the antifreezing agent is set such that even when a vaporization component in the antifreezing agent vaporizes, the purified glycerol is ensured in such a remaining amount as to be equal to or higher than the seal water maintenance lower limit in the seal water portion of the drain trap, and the antifreezing agent is introduced to the seal water portion of the drain trap.